Properly vent clothes dryer exhaust to the outside. 4" x 8' kit includes: (1) 4" plastic preferred hood with tail pipe, (1) removable screen, (1) UL listed (Underwriters Laboratories) 4" x 8' laminated flame resistant transition duct, (1) trim plate, and (2) tension clamps. Preferred hood opening allows for maximum airflow from the dryer while a removable screen keeps outside elements from entering the vent.